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10*0.9-0.9=0.9m
We move all terms to the left:
10*0.9-0.9-(0.9m)=0
We add all the numbers together, and all the variables
-(+0.9m)-0.9+10*0.9=0
We add all the numbers together, and all the variables
-(+0.9m)+8.1=0
We get rid of parentheses
-0.9m+8.1=0
We move all terms containing m to the left, all other terms to the right
-0.9m=-8.1
m=-8.1/-0.9
m=+9
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